Method for braking a traction sheave elevator, traction sheave elevator and use of an emergency power supply
AssigneeKone Corporation
InventorsSeppo Mattlar, Petteri Valjus, Johannes De Jong
Life of this patent
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Abstract
A method for braking a traction sheave elevator stops the elevator in the event of an emergency by the braking of the elevator using a braking device not comprised in the drive machine. A traction sheave elevator is provided with a braking device not comprised in the drive machine and designed to improve the efficiency of emergency stopping. The maximum force decelerating the elevator and generated by the braking device equals about half the weight of the nominal load of the elevator.
Claims13
A method for braking a traction sheave elevator which has a drive machine with a traction sheave and a brake which acts on the traction sheave, hoisting ropes driven by the traction sheave, an elevator car and a counterweight, the elevator car and the counterweight being suspended on the hoisting ropes, the method comprising the steps of braking the elevator in case of an emergency stop by using a braking device not comprised in the drive machine, the braking device including at least one brake, action of the braking device not comprised in the drive machine being applied directly to at least one of the ropes, a guide rail and an equalizing gear of the elevator, a maximum magnitude of force decelerating the elevator car generated by the braking device not comprised in the drive machine equaling about half the weight of a nominal load of the elevator.
A traction sheave elevator comprising a drive machine with a traction sheave, hoisting ropes driven by the traction sheave, an elevator car and counterweight suspended on the hoisting ropes and a braking device not comprised in the drive machine for enhancing braking during emergency stopping, the braking device not comprised in the drive machine applying a braking force directly to at least one of the ropes, a guide rail and an equalizing gear of the elevator, a maximum magnitude of the force decelerating the elevator car generated by the braking device not comprised in the drive machine being equal to about half the weight of a nominal load of the elevator.
An emergency power supply for a traction sheave elevator having a drive machine with a traction sheave, hoisting ropes driven by the traction sheave, an elevator car and counterweight suspended on the hoisting ropes and a braking device not comprised in the drive machine for enhancing braking during emergency stopping, the braking device not comprised in the drive machine applying a braking force directly to at least one of the ropes, a guide rail and an equalizing gear of the elevator, the emergency power supply being connected to at least the braking device not comprised in the drive machine whereby current needed for release of the braking device can be supplied in the event of power failure to thereby release at least the braking device not comprised in the drive machine.
Dependencies are inferred from the claim text.